External gas detection device

Abstract

The external gas detection device comprises: a shell; a gas detection module, which is arranged in the shell and detects the gas introduced from the outside of the shell to obtain gas information; and an external connector, which is connected to the shell and provides a connection of an external power supply to start the operation of the gas detection module, and provides the gas information to achieve external transmission of the gas information.

Description

Technical Field

[0001] This case relates to an external gas detection device, particularly an extremely thin external gas detection device. Background Art

[0002] Suspended particulate matter refers to solid particles or liquid droplets contained in the gas. Due to its very fine particle size, it is easy for it to enter the human lungs through the nasal hair in the nasal cavity, thus causing lung inflammation, asthma or cardiovascular disease. If other pollutants are attached to the suspended particulate matter, it will aggravate the harm to the respiratory system. In recent years, the problem of gas pollution has become increasingly serious, especially the concentration data of fine suspended particulate matter (such as PM2.5) is often too high. The monitoring of the concentration of gas suspended particulate matter has gradually received attention. However, since the gas will flow with the wind direction and wind volume unstably, and the gas quality monitoring stations that currently detect suspended particulate matter are mostly fixed points, it is impossible to confirm the concentration of suspended particulate matter in the surrounding area.

[0003] In addition, modern people are paying more and more attention to the quality of the gases around them. For example, gases such as carbon monoxide, carbon dioxide, volatile organic compounds (VOC), PM2.5, nitric oxide, sulfur oxide, and even particles contained in the gases will affect human health when exposed in the environment, and even endanger life in serious cases. Therefore, the quality of environmental gases has attracted the attention of various countries. How to detect gas quality to avoid and stay away from areas with poor gas quality is a current issue of concern.

[0004] How to confirm the quality of gas? It is feasible to use a gas sensor to detect the surrounding gas. If it can provide detection information in real time to warn people in the environment so that they can take immediate precautions or escape, avoiding the health effects and injuries caused by the gas hazards in the environment, using a gas sensor to detect the surrounding environment can be said to be a very good application.

[0005] Portable devices are mobile devices that modern people carry with them when they go out. Therefore, embedding gas detection modules in portable devices to detect the gas in the surrounding environment is very important. In particular, the current development trend of portable devices is to be light and thin. How to make the gas detection module thinner and assemble it in the application of portable devices is an important topic of this case. Therefore, a miniature and easy-to-carry external gas detection device is needed for users to detect the concentration of suspended particles and gas quality around them at any time and anywhere. Summary of the invention

[0006] The main purpose of this case is to provide an external gas detection device. By embedding a gas detection module in the external gas detection device, the air quality of the user's surrounding environment can be detected at any time, and the air quality information can be transmitted to an external transmission device in real time to obtain gas detection information and a notification warning.

[0007] A broad implementation of the present invention is an external gas detection device, comprising: a shell; a gas detection module, arranged in the shell, detecting the gas introduced from outside the shell to obtain gas information; and an external connector, connected to the shell, providing a connection for an external power supply to start the operation of the gas detection module, and providing the gas information to achieve external transmission of the gas information. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1A FIG. 1 is a schematic diagram of the appearance of an external gas detection device according to an embodiment of the present invention.

[0009] Figure 1B FIG. 1 is a schematic diagram of the appearance of a gas detection transmission module of another embodiment of the external gas detection device of the present invention.

[0010] Figure 1C This is a schematic diagram of the appearance of the assembly relationship between the gas detection transmission module and the external connector of another embodiment of the external gas detection device of the present invention.

[0011] Figure 1D This is a schematic diagram of the appearance of the gas detection transmission module, the external connector and the shell assembly relationship of another embodiment of the external gas detection device of the present case.

[0012] Figure 1E FIG. 1 is a schematic diagram of the appearance of another embodiment of the external gas detection device of the present invention.

[0013] Figure 2A This is a three-dimensional schematic diagram of the appearance of the gas detection module in this case.

[0014] Figure 2B This is a three-dimensional schematic diagram of the appearance of the gas detection module in this case from another angle.

[0015] Figure 2C Shown is an exploded three-dimensional schematic diagram of the gas detection module in this case.

[0016] Figure 3A Shown is a three-dimensional schematic diagram of the base of the gas detection module in this case.

[0017] Figure 3B Shown is a three-dimensional schematic diagram of the base of the gas detection module in this case from another angle.

[0018] Figure 4The figure shows a three-dimensional schematic diagram of the base of the gas detection module of the present invention accommodating the laser component and the particle sensor.

[0019] Figure 5A The figure shows an exploded three-dimensional schematic diagram of the piezoelectric actuator of the gas detection module of the present invention combined with the base.

[0020] Figure 5B Shown is a three-dimensional schematic diagram of the piezoelectric actuator of the gas detection module of this case combined with the base.

[0021] Fig. 6A Shown is an exploded three-dimensional schematic diagram of the piezoelectric actuator of the gas detection module in this case.

[0022] Figure 6B Shown is a three-dimensional schematic diagram of the piezoelectric actuator of the gas detection module of the present invention, exploded from another angle.

[0023] Fig. 7A The figure shows a cross-sectional view of the piezoelectric actuator of the gas detection module of the present invention when it is combined with the bearing area of ​​the gas guide component.

[0024] Figure 7B and Figure 7C for Fig. 7A Schematic diagram of the piezoelectric actuator in action.

[0025] FIG. 8A to FIG. 8C Schematic diagram of the gas path of the gas detection module.

[0026] Fig. 9 Shown is a schematic diagram of the light beam emission path of the laser component of the gas detection module in this case.

[0027] Fig. 10A Shown is a cross-sectional schematic diagram of the micro-electromechanical pump of the gas detection module in this case.

[0028] Fig. 10B Shown is a schematic diagram of the exploded view of the micro-electromechanical pump of the gas detection module in this case.

[0029] FIG. 11A to FIG. 11C Shown is a schematic diagram of the operation of the micro-electromechanical pump of the gas detection module in this case.

[0030] Fig.12 This is a block diagram of the configuration relationship between the control circuit unit and related components of the external gas detection device of this case.

[0031] Description of Reference Numerals

[0032] 100: External gas detection device

[0033] 100A: Gas detection transmission module

[0034] 10: Shell

[0035] 10a: Air intake passage

[0036] 10b: Air outlet channel

[0037] 20: Gas detection module

[0038] 30: External connector

[0039] 30a: AC adapter

[0040] 30b: USB connection port

[0041] 40: Control circuit unit

[0042] 40a: Microprocessor

[0043] 40b: Communicator

[0044] 40c: Power module

[0045] 50: External connection device

[0046] 60: External transmission device

[0047] 70: Power supply device

[0048] 1: Base

[0049] 11: First surface

[0050] 12: Second Surface

[0051] 13: Laser setting area

[0052] 14: Intake groove

[0053] 14a: Air Inlet

[0054] 14b: Light-transmitting window

[0055] 15: Gas guide component bearing area

[0056] 15a: Ventilation hole

[0057] 15b: Positioning bump

[0058] 16: Vent groove

[0059] 16a: Air outlet

[0060] 16b: First interval

[0061] 16c: Second interval

[0062] 17: Light trap area

[0063] 17a: Light trapping structure

[0064] 2: Piezoelectric Actuator

[0065] 21: Jet hole sheet

[0066] 210: Suspended sheet

[0067] 211: Hollow holes

[0068] 212: Gap

[0069] 22: Cavity frame

[0070] 23: Actuator

[0071] 231: Piezoelectric carrier

[0072] 2311: Piezoelectric pin

[0073] 232: Adjust the resonance plate

[0074] 233: Piezoelectric plate

[0075] 24: Insulation frame

[0076] 25: Conductive frame

[0077] 251: Conductive pin

[0078] 252: Conductive electrode

[0079] 26: Resonance Chamber

[0080] 27: Airflow Chamber

[0081] 2a: MEMS pump

[0082] 21a: First substrate

[0083] 211a: Inflow hole

[0084] 212a: First surface

[0085] 213a: Second surface

[0086] 22a: First oxide layer

[0087] 221a: Confluence Channel

[0088] 222a: Confluence chamber

[0089] 23a: Second substrate

[0090] 231a: Silicon wafer layer

[0091] 2311a: Actuating part

[0092] 2312a: Periphery

[0093] 2313a: Connection

[0094] 2314a: Fluid channel

[0095] 232a: Second oxide layer

[0096] 2321a: Vibration Chamber

[0097] 233a: Silicon layer

[0098] 2331a: Perforation

[0099] 2332a: Vibration Department

[0100] 2333a: Fixed part

[0101] 2334a: Third Surface

[0102] 2335a: The fourth surface

[0103] 24a: Piezoelectric components

[0104] 241a: Lower electrode layer

[0105] 242a: Piezoelectric layer

[0106] 243a: Insulation layer

[0107] 244a: Upper electrode layer

[0108] 3: Driver circuit board

[0109] 4: Laser components

[0110] 5: Particle sensor

[0111] 6: Outer cover

[0112] 61: Side panels

[0113] 61a: Air intake frame

[0114] 61b: Air outlet frame

[0115] 7a: First Volatile Organic Compound Sensor

[0116] 7b: Second VOC sensor

[0117] D: Light trap distance

[0118] H, H1: thickness

[0119] L, L1: length

[0120] W, W1: Width DETAILED DESCRIPTION

[0121] The embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different aspects without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0122] See also Figures 1A to 1E , FIG. 2A to FIG. 2C as well as Fig.12 As shown, the present case provides an external gas detection device 100 including a shell 10, a gas detection module 20 and an external connector 30, wherein the shell 10 is provided with an air inlet channel 10a and an air outlet channel 10b, and the gas detection module 20 is arranged in the shell 10, and the gas outside the shell 10 is introduced through the air inlet channel 10a to obtain gas information, and then the detected gas is exported to the outside of the shell 10 through the air outlet channel 10b, and the external connector 30 is connected and arranged on the shell 10, providing a connection for an external power supply to start the operation of the gas detection module 20, and providing gas information to obtain external transmission of gas information. The external connector 30 can be a USB connection port, a mini USB connection port, a Micro USB connection port, a USB Type C connection port, an AC adapter, a DC power adapter, a power connector, a terminal connector, or one or a combination thereof. In this embodiment, as Figure 1A As shown, the external connector 30 can be a female socket combination of an AC adapter 30a and a USB connection port 30b. The AC adapter 30a can be plugged into an external socket (not shown) and electrically connected to it to provide a connection to an external power source to start the operation of the gas detection module 20. The gas detection module 20 detects gas and provides gas information, and then connects to an external connection device 50 (such as a mobile device) through the USB connection port 30b to provide gas information and achieve external transmission of gas information.

[0123] Again, if Figure 1B and Fig.12 As shown, the external gas detection device 100 further includes a control circuit unit 40, and the control circuit unit 40 is provided with a microprocessor 40a, a communicator 40b and a power module 40c, which are electrically connected thereto. In order to make the external gas detection device 100 conform to the trend of being thin, small and easy to carry, the overall structure thickness of the gas detection module 20 is reduced in design, and then assembled and combined with the control circuit unit 40 to form a gas detection transmission module 100A. The length L1 of the gas detection transmission module 100A is between 35mm and 55mm, the width W1 is between 10mm and 35mm, and the thickness H1 is between 1mm and 7.5mm, which is conducive to the construction of Figure 1BThe miniaturized gas detection transmission module 100A shown in FIG. Figure 1C As shown, the gas detection transmission module 100A is assembled with an external connector 30 to form an electrical connection, and then covered and protected by the housing 10, while the external connector 30 is exposed to make an electrical connection (such as Figure 1D As shown), the housing 10 is provided with an air inlet passage 10a and an air outlet passage 10b; Fig.12 As shown, the power module 40c can receive and store an electric energy by wireless transmission through a power supply device 70, so that the microprocessor 40a can control the driving signal of the gas detection module 20 to start the operation of the gas detection module 20, and the gas detection module 20 is arranged in the shell 10, and the gas outside the shell 10 is introduced through the air inlet channel 10a to obtain a gas information, and then the detected gas is output to the outside of the shell 10 through the air outlet channel 10b. The microprocessor 40a converts the gas information of the gas detection module 20 into a detection data for storage, and the communicator 40b is used to receive the detection data output by the microprocessor 40a, and can transmit the detection data to an external transmission device 60 for storage through communication, so as to enable the external transmission device 60 to transmit the detection data to the outside. The device 60 generates a gas detection information and a notification alarm; or, the external connector 30 is connected to the external connection device 50 (such as a mobile device), providing a connection of an external power supply to start the operation of the gas detection module 20, the gas detection module 20 detects the gas outside the shell 10 to obtain a gas information, and the microprocessor 40a converts the gas information of the gas detection module 20 into a detection data storage, and the external connector 30 is connected to the external connection device 50, and provides the gas information to the external connection device 50 for processing and application, so that the external connection device 50 can be transmitted to an external transmission device 60 for storage through communication transmission, so that the external transmission device 60 generates a gas detection information and a notification alarm.

[0124] The external transmission device 60 can be a cloud system, a portable device, a computer system, etc. The communication transmission can be through wired communication transmission, such as USB connection communication transmission, or through wireless communication transmission, such as Wi-Fi communication transmission, Bluetooth communication transmission, wireless radio frequency identification communication transmission, near field communication transmission, etc. The length L of the external gas detection device 100 is between 45mm and 70mm, the width W is between 25mm and 42mm, and the thickness H is between 7mm and 13mm, which is conducive to the configuration of Figures 1A to 1E The design shown is light, thin, miniaturized and easy to carry.

[0125] like FIG. 2A to FIG. 2CAs shown, the gas detection module 20 comprises a base 1, a piezoelectric actuator 2, a driving circuit board 3, a laser component 4, a particle sensor 5 and an outer cover 6; wherein, the driving circuit board 3 is sealed and attached to the second surface 12 of the base 1, the laser component 4 is arranged on the driving circuit board 3 and is electrically connected to the driving circuit board 3, the particle sensor 5 is also arranged on the driving circuit board 3 and is electrically connected to the driving circuit board 3, and the outer cover 6 is a cover base 1, and is attached and sealed on the first surface 11 of the base 1, and the outer cover 6 has a side plate 61, and the side plate 61 has an air inlet frame 61a and an air outlet frame 61b. When the gas detection module 20 is arranged in the housing 10, the air inlet frame 61a corresponds to the air inlet channel 10a of the housing 10, and the air outlet frame 61b corresponds to the air outlet channel 10b of the housing 10.

[0126] Another example Figure 3A and Figure 3B As shown, the base 1 has a first surface 11, a second surface 12, a laser setting area 13, an air inlet groove 14, an air guide component bearing area 15 and an air outlet groove 16. The first surface 11 and the second surface 12 are two surfaces arranged opposite to each other. The laser setting area 13 is hollowed out from the first surface 11 toward the second surface 12. The air inlet groove 14 is recessed from the second surface 12 and is adjacent to the laser setting area 13. The air inlet groove 14 is provided with an air inlet port 14a, which is connected to the outside of the base 1 and corresponds to the air inlet frame port 61a of the outer cover 6, and a light-transmitting window 14b is passed through the two side walls and is connected to the laser setting area 13; therefore, the first surface 11 of the base 1 is attached and covered by the outer cover 6, and the second surface 12 is attached and covered by the driving circuit board 3, so that the air inlet groove 14 and the driving circuit board 3 jointly define an air inlet path.

[0127] The air guide component bearing area 15 is formed by a depression of the second surface 12 and communicates with the air inlet groove 14 , and has an air hole 15 a penetrating through the bottom surface. The above-mentioned air outlet groove 16 is provided with an air outlet port 16a, and the air outlet port 16a is arranged corresponding to the air outlet frame port 61b of the outer cover 6. The air outlet groove 16 includes a first interval 16b formed by a depression of the vertical projection area of ​​the first surface 11 corresponding to the air guide component bearing area 15, and an area extending from the vertical projection area of ​​the non-air guide component bearing area 15, and a second interval 16c formed by hollowing out from the first surface 11 to the second surface 12, wherein the first interval 16b is connected to the second interval 16c to form a step difference, and the first interval 16b of the air outlet groove 16 is communicated with the air vent 15a of the air guide component bearing area 15, and the second interval 16c of the air outlet groove 16 is communicated with the air outlet port 16a; therefore, when the first surface 11 of the base 1 is attached and covered by the outer cover 6, and the second surface 12 is attached and covered by the driving circuit board 3, the air outlet groove 16, the outer cover 6 and the driving circuit board 3 jointly define an air outlet path.

[0128] Figure 4 The figure shows a schematic diagram of the base accommodating the laser component and the particle sensor. The laser component 4 and the particle sensor 5 are both arranged on the driving circuit board 3 and in the base 1. In order to clearly illustrate the positions of the laser component 4 and the particle sensor 5 in the base 1, Figure 4 The driving circuit board 3 is omitted for clarity; Figure 4 and Figure 2C The laser component 4 will be accommodated in the laser setting area 13 of the base 1, and the particle sensor 5 will be accommodated in the air intake groove 14 of the base 1 and aligned with the laser component 4. In addition, the laser component 4 corresponds to the light-transmitting window 14b, for the laser emitted by the laser component 4 to pass through, so that the laser is irradiated into the air intake groove 14, and the path of the light beam emitted by the laser component 4 passes through the light-transmitting window 14b and forms an orthogonal direction with the air intake groove 14.

[0129] The projection light beam emitted by the laser assembly 4 enters the air inlet groove 14 through the light-transmitting window 14b, and irradiates the suspended particles contained in the gas in the air inlet groove 14. When the light beam contacts the suspended particles, it will scatter and generate projection light spots. The particle sensor 5 receives the projection light spots generated by the scattering and calculates to obtain relevant information about the particle size and concentration of the suspended particles contained in the gas. The particle sensor 5 is a PM2.5 sensor.

[0130] Another example Figure 5A and Figure 5B As shown, the above-mentioned piezoelectric actuator 2 is accommodated in the air guide component carrying area 15 of the base 1. The air guide component carrying area 15 is a square, and a positioning protrusion 15b is respectively provided at its four corners. The piezoelectric actuator 2 is set in the air guide component carrying area 15 through the four positioning protrusions 15b. In addition, the air guide component carrying area 15 is communicated with the air inlet groove 14. When the piezoelectric actuator 2 is actuated, the piezoelectric actuator 2 draws the gas in the air inlet groove 14, allows the gas to enter the piezoelectric actuator 2, and introduces the gas into the air outlet groove 16 through the air vent 15a of the air guide component carrying area 15.

[0131] Also see Fig. 6A and Figure 6B As shown, the piezoelectric actuator 2 comprises: an air jet plate 21 , a cavity frame 22 , an actuator 23 , an insulating frame 24 and a conductive frame 25 .

[0132] The above-mentioned air jet hole sheet 21 is made of a flexible material, and has a suspension sheet 210 and a hollow hole 211. The suspension sheet 210 is a sheet-like structure that can be bent and vibrated, and its shape and size roughly correspond to the inner edge of the air guide component bearing area 15, but it is not limited to this. The shape of the suspension sheet 210 can also be one of square, round, elliptical, triangular and polygonal. The hollow hole 211 runs through the center of the suspension sheet 210 to allow gas to flow.

[0133] The cavity frame 22 is stacked on the jet hole sheet 21, and its appearance corresponds to the jet hole sheet 21. The actuator 23 is stacked on the cavity frame 22, and defines a resonance chamber 26 between the cavity frame 22 and the suspension sheet 210. The insulating frame 24 is stacked on the actuator 23, and its appearance is similar to the cavity frame 22. The conductive frame 25 is stacked on the insulating frame 24, and its appearance is similar to the insulating frame 24. The conductive frame 25 has a conductive pin 251 and a conductive electrode 252. The conductive pin 251 extends outward from the outer edge of the conductive frame 25, and the conductive electrode 252 extends inward from the inner edge of the conductive frame 25. In addition, the actuator 23 further includes a piezoelectric carrier 231, an adjustment resonance plate 232 and a piezoelectric plate 233. The piezoelectric carrier 231 is supported and stacked on the cavity frame 22, the adjustment resonance plate 232 is supported and stacked on the piezoelectric carrier 231, and the piezoelectric plate 233 is supported and stacked on the adjustment resonance plate 232. The adjustment resonance plate 232 and the piezoelectric plate 233 are accommodated in the insulating frame 24 and are electrically connected to the piezoelectric plate 233 by the conductive electrode 252 of the conductive frame 25. Among them, the piezoelectric carrier 231 and the adjustment resonance plate 232 are made of conductive materials. The piezoelectric carrier 231 has a piezoelectric pin 2311, and the piezoelectric pin 2311 is connected to the conductive pin 251. The driving circuit (not shown) on the driving circuit board 3 receives the driving signal (driving frequency and driving voltage). The driving signal is formed into a loop by the piezoelectric pin 2311, the piezoelectric carrier 231, the adjustment resonance plate 232, the piezoelectric plate 233, the conductive electrode 252, the conductive frame 25, and the conductive pin 251. The insulating frame 24 blocks the conductive frame 25 and the actuator 23 to avoid short circuit, so that the driving signal can be transmitted to the piezoelectric plate 233. After receiving the driving signal (driving frequency and driving voltage), the piezoelectric plate 233 is deformed due to the piezoelectric effect to further drive the piezoelectric carrier 231 and the adjustment resonance plate 232 to generate reciprocating bending vibrations.

[0134] As described above, the adjustment resonance plate 232 is located between the piezoelectric plate 233 and the piezoelectric carrier plate 231, and serves as a buffer between the two, and can adjust the vibration frequency of the piezoelectric carrier plate 231. Basically, the thickness of the adjustment resonance plate 232 is greater than the thickness of the piezoelectric carrier plate 231, and the thickness of the adjustment resonance plate 232 can be changed, thereby adjusting the vibration frequency of the actuator 23.

[0135] Please also see Fig. 6A , Figure 6B and Fig. 7AAs shown, the jet hole sheet 21, the cavity frame 22, the actuator 23, the insulating frame 24 and the conductive frame 25 are stacked and positioned in the gas guide component supporting area 15 in sequence, so that the piezoelectric actuator 2 is supported and positioned in the gas guide component supporting area 15, and the bottom is fixed on the positioning protrusion 15b to support and position the piezoelectric actuator 2, so that the piezoelectric actuator 2 defines a gap 212 between the suspension sheet 210 and the inner edge of the gas guide component supporting area 15. The gap 212 surrounds the outer periphery of the piezoelectric actuator 2 for gas circulation.

[0136] Please refer to Fig. 7A As shown, an airflow chamber 27 is formed between the above-mentioned air jet hole sheet 21 and the bottom surface of the air guide component bearing area 15. The airflow chamber 27 is connected to the resonance chamber 26 between the actuator 23, the cavity frame 22 and the suspension sheet 210 through the hollow hole 211 of the air jet hole sheet 21. By controlling the vibration frequency of the gas in the resonance chamber 26 to be close to the vibration frequency of the suspension sheet 210, the resonance chamber 26 and the suspension sheet 210 can generate a Helmholtz resonance effect, so as to improve the gas transmission efficiency.

[0137] again Figure 7B and Figure 7C for Fig. 7A Please refer to the schematic diagram of the piezoelectric actuator. Figure 7B As shown, when the piezoelectric plate 233 moves in a direction away from the bottom surface of the air guide component bearing area 15, it drives the suspension plate 210 of the air jet hole plate 21 to move in a direction away from the bottom surface of the air guide component bearing area 15, so that the volume of the air flow chamber 27 expands rapidly, and its internal pressure drops to form a negative pressure, attracting the gas outside the piezoelectric actuator 2 to flow in from the gap 212 and enter the resonance chamber 26 through the hollow hole 211, so that the air pressure in the resonance chamber 26 increases and a pressure gradient is generated. Figure 7C As shown, when the piezoelectric plate 233 drives the suspension plate 210 of the jet hole plate 21 to move toward the bottom surface of the air guide component bearing area 15, the gas in the resonance chamber 26 flows out quickly through the hollow hole 211, squeezing the gas in the air flow chamber 27, and making the converged gas quickly and massively ejected in an ideal gas state close to Bernoulli's law and introduced into the vent 15a of the air guide component bearing area 15. Figure 7B and Figure 7C The action of the piezoelectric plate 233 can make the piezoelectric plate 233 vibrate reciprocatingly, and according to the principle of inertia, the internal air pressure of the resonance chamber 26 after exhaust is lower than the equilibrium air pressure, which will guide the gas to re-enter the resonance chamber 26, so that the vibration frequency of the gas in the resonance chamber 26 is controlled to be close to the vibration frequency of the piezoelectric plate 233, so as to produce the Helmholtz resonance effect, so as to realize high-speed and large-scale transmission of gas.

[0138] Another example FIG. 8A to FIG. 8CThe gas path diagram of the gas detection module 20 is shown. Fig. 8A As shown, the gas enters from the air inlet frame opening 61a of the outer cover 6, enters the air inlet groove 14 of the base 1 through the air inlet opening 14a, and flows to the position of the particle sensor 5. Figure 8B As shown, the piezoelectric actuator 2 is continuously driven to absorb the gas in the air intake path, so that the external gas is quickly introduced and stably circulated, and passes through the top of the particle sensor 5. At this time, the laser component 4 emits a projection light beam through the light-transmitting window 14b into the air intake groove 14, irradiating the air intake groove 14 through the suspended particles contained in the gas above the particle sensor 5. When the light beam contacts the suspended particles, it will scatter and generate a projection light spot. The particle sensor 5 receives the projection light spot generated by the scattering and calculates to obtain relevant information on the particle size and concentration of the suspended particles contained in the gas. The gas above the particle sensor 5 is also continuously driven and transmitted by the piezoelectric actuator 2 and introduced into the vent hole 15a of the air guide component bearing area 15, and enters the first interval 16b of the air outlet groove 16. Finally, as shown in FIG. Figure 8C As shown, after the gas enters the first section 16b of the gas outlet groove 16, the piezoelectric actuator 2 will continuously deliver the gas into the first section 16b, and the gas in the first section 16b will be pushed to the second section 16c, and finally discharged outward through the gas outlet 16a and the gas outlet frame opening 61b.

[0139] See also Fig. 9 As shown, the base 1 further includes a light trap area 17, which is hollowed out from the first surface 11 to the second surface 12 and corresponds to the laser setting area 13, and the light trap area 17 passes through the light-transmitting window 14b so that the light beam emitted by the laser component 4 can be projected therein, and the light trap area 17 is provided with a light trap structure 17a with an oblique cone surface, and the light trap structure 17a corresponds to the path of the light beam emitted by the laser component 4; in addition, the light trap structure 17a makes the projected light beam emitted by the laser component 4 reflected into the light trap area 17 at the oblique cone surface structure, so as to prevent the light beam from being reflected to the position of the particle sensor 5, and a light trap distance D is maintained between the position of the projected light beam received by the light trap structure 17a and the light-transmitting window 14b, and this light trap distance D needs to be greater than 3mm. When the light trap distance D is less than 3mm, it will cause the projected light beam projected on the light trap structure 17a to be directly reflected back to the position of the particle sensor 5 due to excessive stray light after being reflected, resulting in distortion of the detection accuracy.

[0140] Please continue reading Fig. 9 and Figure 2CAs shown, the gas detection module 20 of the present case can not only detect the particles in the gas, but also further detect the characteristics of the introduced gas, such as formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, ozone, etc. Therefore, the gas detection module 20 of the present case further includes a first volatile organic compound sensor 7a, which is positioned on the driving circuit board 3 and electrically connected thereto, and is accommodated in the gas outlet groove 16, and detects the gas derived from the gas outlet path to detect the concentration or characteristics of the volatile organic compounds contained in the gas in the gas outlet path. Or the gas detection module 20 of the present case further includes a second volatile organic compound sensor 7b, which is positioned on the driving circuit board 3 and electrically connected thereto, and the second volatile organic compound sensor 7b is accommodated in the light trap area 17, and detects the concentration or characteristics of the volatile organic compounds contained in the gas introduced into the light trap area 17 through the gas inlet path of the gas inlet groove 14 and through the light-transmitting window 14b.

[0141] From the above description, it can be seen that the gas detection module 20 of the present case is structurally designed with appropriately configured laser setting area 13, air inlet groove 14, air guide component bearing area 15 and air outlet groove 16 on the base 1, and is matched with the sealing design of the outer cover 6 and the driving circuit board 3, so that the outer cover 6 is covered on the first surface 11 of the base 1, and the driving circuit board 3 is covered on the second surface 12, so that the air inlet groove 14 and the driving circuit board 3 jointly define an air inlet path, and the air outlet groove 16, the outer cover 6 and the driving circuit board 3 jointly define an air outlet path, forming a single-layer air guide channel path.

[0142] In addition, another embodiment of the piezoelectric actuator 2 of the present invention may be a micro-electromechanical pump 2a, see Fig. 10A and Fig. 10B As shown, the MEMS pump 2a includes a first substrate 21a, a first oxide layer 22a, a second substrate 23a and a piezoelectric element 24a.

[0143] The first substrate 21a is a silicon wafer having a thickness between 150 and 400 μm. The first substrate 21a has a plurality of inflow holes 211a, a first surface 212a, and a second surface 213a. In the present embodiment, the number of the plurality of inflow holes 211a is 4, but not limited thereto. Each inflow hole 211a extends from the second surface 213a to the first surface 212a. In order to enhance the inflow effect, the inflow hole 211a is tapered from the second surface 213a to the first surface 212a.

[0144] The first oxide layer 22a is a silicon dioxide (SiO2) thin film with a thickness between 10 and 20 micrometers (μm). The first oxide layer 22a is stacked on the first surface 212a of the first substrate 21a. The first oxide layer 22a has a plurality of confluence channels 221a and a confluence chamber 222a. The number and position of the confluence channels 221a correspond to the inflow holes 211a of the first substrate 21a. In this embodiment, the number of the confluence channels 221a is also 4. One end of the 4 confluence channels 221a is respectively connected to the 4 inflow holes 211a of the first substrate 21a, and the other end of the 4 confluence channels 221a is connected to the confluence chamber 222a, so that the gas enters from the inflow holes 211a respectively, and then converges into the confluence chamber 222a through the corresponding confluence channels 221a.

[0145] The second substrate 23a is a silicon wafer (SOI wafer) with silicon on an insulating layer, comprising: a silicon wafer layer 231a, a second oxide layer 232a and a silicon material layer 233a; the thickness of the silicon wafer layer 231a is between 10 and 20 micrometers (μm), and has an actuating portion 2311a, a peripheral portion 2312a, a plurality of connecting portions 2313a and a plurality of fluid channels 2314a, the actuating portion 2311a is circular; the peripheral portion 2312a is hollow and annular, surrounding the periphery of the actuating portion 2311a; the plurality of connecting portions 2313a are respectively located between the actuating portion 2311a and the peripheral portion 2312a, and connect the two to provide a function of elastic support. The plurality of fluid channels 2314a are formed around the periphery of the actuating portion 2311a, and are respectively located between the plurality of connecting portions 2313a.

[0146] The second oxide layer 232a is a silicon oxide layer with a thickness between 0.5 and 2 micrometers (μm), formed on the silicon wafer layer 231a, in a hollow ring shape, and defines a vibration chamber 2321a with the silicon wafer layer 231a. The silicon material layer 233a is circular, stacked on the second oxide layer 232a and bonded to the first oxide layer 22a. The silicon material layer 233a is a silicon dioxide (SiO2) film with a thickness between 2 and 5 micrometers (μm), having a through hole 2331a, a vibrating portion 2332a, a fixed portion 2333a, a third surface 2334a and a fourth surface 2335a. The through hole 2331a is formed at the center of the silicon material layer 233a, the vibration part 2332a is located in the peripheral area of ​​the through hole 2331a and vertically corresponds to the vibration chamber 2321a, the fixed part 2333a is the peripheral area of ​​the silicon material layer 233a, and is fixed to the second oxide layer 232a by the fixed part 2333a, the third surface 2334a is bonded to the second oxide layer 232a, and the fourth surface 2335a is bonded to the first oxide layer 22a; the piezoelectric component 24a is stacked on the actuating part 2311a of the silicon wafer layer 231a.

[0147] The piezoelectric component 24a includes a lower electrode layer 241a, a piezoelectric layer 242a, an insulating layer 243a and an upper electrode layer 244a. The lower electrode layer 241a is stacked on the actuating portion 2311a of the silicon wafer layer 231a, and the piezoelectric layer 242a is stacked on the lower electrode layer 241a. The two are electrically connected through their contact area. In addition, the width of the piezoelectric layer 242a is smaller than the width of the lower electrode layer 241a, so that the piezoelectric layer 242a cannot completely cover the lower electrode layer 241a. An insulating layer 243a is stacked on a partial area of ​​layer 242a and an area of ​​the lower electrode layer 241a that is not shielded by the piezoelectric layer 242a. Finally, an upper electrode layer 244a is stacked on the insulating layer 243a and the remaining surface of the piezoelectric layer 242a that is not shielded by the insulating layer 243a, so that the upper electrode layer 244a can be in contact with the piezoelectric layer 242a for electrical connection. At the same time, the insulating layer 243a is used to block the upper electrode layer 244a and the lower electrode layer 241a to avoid direct contact between the two and cause a short circuit.

[0148] Please refer to Sections 11A to Fig. 11C The figure shows the operation diagram of the micro-electromechanical pump 2a. Fig.11A As shown, the lower electrode layer 241a and the upper electrode layer 244a of the piezoelectric component 24a receive the driving voltage and driving signal (not shown) transmitted by the driving circuit board 3 and transmit it to the piezoelectric layer 242a. After receiving the driving voltage and driving signal, the piezoelectric layer 242a begins to deform due to the influence of the inverse piezoelectric effect, which will drive the actuator 2311a of the silicon wafer layer 231a to start displacement. When the piezoelectric component 24a drives the actuator 2311a to move upward and increase the distance between it and the second oxide layer 232a, at this time, the volume of the vibration chamber 2321a of the second oxide layer 232a will increase, so that a negative pressure is formed in the vibration chamber 2321a, and the gas in the confluence chamber 222a of the first oxide layer 22a is sucked into it through the perforation 2331a. Please continue to refer to Fig. 11B As shown, when the actuator 2311a is pulled upward by the piezoelectric component 24a, the vibration part 2332a of the silicon material layer 233a will move upward due to the influence of the resonance principle. When the vibration part 2332a moves upward, it will compress the space of the vibration chamber 2321a and push the gas in the vibration chamber 2321a to move toward the fluid channel 2314a of the silicon wafer layer 231a, so that the gas can be discharged upward through the fluid channel 2314a. While the vibration part 2332a moves upward to compress the vibration chamber 2321a, the volume of the confluence chamber 222a is increased due to the displacement of the vibration part 2332a, and a negative pressure is formed inside it, which absorbs the gas outside the micro-electromechanical pump 2a into it through the inlet 211a. Finally, as shown in FIG. Fig. 11CAs shown, when the piezoelectric component 24a drives the actuator 2311a of the silicon wafer layer 231a to move downward, the gas in the vibration chamber 2321a is pushed toward the fluid channel 2314a and the gas is discharged, and the vibration portion 2332a of the silicon material layer 233a is also driven by the actuator 2311a to move downward, and the gas in the convergence chamber 222a is synchronously compressed to move toward the vibration chamber 2321a through the through hole 2331a. Subsequently, when the piezoelectric component 24a drives the actuator 2311a to move upward, the volume of the vibration chamber 2321a will be greatly increased, and then there will be a higher suction force to suck the gas into the vibration chamber 2321a, and the above actions are repeated, so that the piezoelectric component 24a continuously drives the actuator 2311a to move up and down to make the vibration portion 2332a move up and down in conjunction, and by changing the internal pressure of the micro-electromechanical pump 2a, it continuously absorbs and discharges gas, thereby completing the action of the micro-electromechanical pump 2a.

[0149] In summary, the external gas detection device provided in this case can detect the air quality of the user's surrounding environment at any time by embedding the gas detection module in the external gas detection device, and can instantly transmit the air quality information to the external transmission device to obtain gas detection information and a notification warning, which is highly industrially applicable and progressive.

Claims

1. An external gas detection device, comprising: a housing; a gas detection module, disposed in the housing, for detecting gas introduced from outside the housing to obtain gas information; and An external connector is connected to the housing to provide a connection for an external power source to start the operation of the gas detection module and to provide the gas information to achieve external transmission of the gas information; The gas detection module contains: A base having: a first surface; a second surface, opposite to the first surface; A laser setting area is formed by hollowing out from the first surface toward the second surface; An air inlet groove is formed by being recessed from the second surface and is adjacent to the laser setting area. The air inlet groove is provided with an air inlet port connected to the outside of the base, and a light-transmitting window is passed through the two side walls and is connected to the laser setting area; An air guide component bearing area is formed by being recessed from the second surface and connected to the air inlet groove, and has an air vent through the bottom surface, and each of the four corners of the air guide component bearing area has a positioning protrusion; as well as An air outlet groove is recessed from the first surface corresponding to the bottom surface of the air guide component bearing area, and is hollowed out from the first surface toward the second surface in the area of ​​the first surface not corresponding to the air guide component bearing area, and is connected to the vent hole, and is provided with an air outlet, which is connected to the outside of the base; A piezoelectric actuator is accommodated in the air guide component bearing area; A driving circuit board, the cover is attached to the second surface of the base; A laser assembly is positioned on the driving circuit board and electrically connected thereto, and is correspondingly accommodated in the laser setting area, and a light beam path emitted by the laser assembly passes through the light-transmitting window and forms an orthogonal direction with the air inlet groove; a particle sensor, positioned on the driving circuit board and electrically connected thereto, and correspondingly disposed at a position in a direction orthogonal to the air inlet groove and the path of the light beam projected by the laser assembly, so as to detect particles passing through the air inlet groove and irradiated by the light beam projected by the laser assembly; as well as An outer cover, covering the first surface of the base, and having a side plate, the side plate is respectively provided with an air inlet frame opening and an air outlet frame opening at positions corresponding to the air inlet and the air outlet of the base; The outer cover is covered on the first surface of the base, and the driving circuit board is sealed on the second surface, so that the air inlet groove and the driving circuit board together define an air inlet path, and the air outlet groove, the outer cover and the driving circuit board together define an air outlet path, so that the piezoelectric actuator accelerates and guides the external gas into the air inlet path from the air inlet frame opening, and passes through the particle sensor to detect the particle concentration in the gas, and the gas is guided by the piezoelectric actuator, and is discharged into the air outlet path from the vent hole, and finally discharged from the air outlet frame opening.

2. The external gas detection device according to claim 1, characterized in that: The external connector is one of a USB connection port, a miniUSB connection port, a Micro USB connection port, a USB Type C connection port, an AC adapter, a DC power adapter, a power connector, a terminal connector, or a combination thereof.

3. The external gas detection device according to claim 1, characterized in that: The base further comprises a light trap area which is hollowed out from the first surface toward the second surface and corresponds to the laser setting area. The light trap area is provided with a light trap structure with an oblique cone surface which is arranged corresponding to the beam path.

4. The external gas detection device according to claim 3, characterized in that: The position of the projection light source received by the light trap structure maintains a light trap distance from the light-transmitting window.

5. The external gas detection device according to claim 4, characterized in that: The light trap distance is greater than 3 mm.

6. The external gas detection device according to claim 1, characterized in that: The particle sensor is a PM2.5 sensor.

7. The external gas detection device according to claim 1, characterized in that: The piezoelectric actuator comprises: A jet hole sheet, comprising a suspension sheet and a hollow hole, the suspension sheet can bend and vibrate, and the hollow hole is formed at the center of the suspension sheet; A cavity frame, supported and stacked on the suspension sheet; An actuator is supported and stacked on the cavity frame to receive voltage and generate reciprocating bending vibration; An insulating frame, supported and stacked on the actuating body; as well as A conductive frame, supported and stacked on the insulating frame; The jet hole sheet is fixedly arranged on the positioning protrusion support and positioning in the air guide component bearing area, so that a gap is defined between the jet hole sheet and the inner edge of the air guide component bearing area for gas circulation, and an airflow chamber is formed between the jet hole sheet and the bottom of the air guide component bearing area, and a resonance chamber is formed between the actuator, the cavity frame and the suspension sheet. By driving the actuator to drive the jet hole sheet to resonate, the suspension sheet of the jet hole sheet produces reciprocating vibration displacement to attract gas to pass through the gap into the airflow chamber and then discharge it, thereby realizing the transmission flow of gas.

8. The external gas detection device according to claim 7, characterized in that: The actuator comprises: A piezoelectric carrier plate is supported and stacked on the cavity frame; an adjustment resonance plate, supported and stacked on the piezoelectric carrier; and A piezoelectric plate is supported and stacked on the adjustment resonance plate to receive voltage to drive the piezoelectric carrier plate and the adjustment resonance plate to generate reciprocating bending vibration.

9. The external gas detection device according to claim 1, characterized in that: It further comprises a first volatile organic compound sensor, which is positioned on the driving circuit board and electrically connected thereto, and is accommodated in the gas outlet groove to detect the gas derived from the gas outlet path.

10. The external gas detection device according to claim 3, characterized in that: It further comprises a second volatile organic compound sensor, which is positioned on the driving circuit board and electrically connected thereto, and is accommodated in the light trap area to detect the gas introduced into the light trap area through the air intake path of the air intake groove and through the light-transmitting window.

11. The external gas detection device according to claim 9 or 10, characterized in that: The gas is one of formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, and ozone.

12. The external gas detection device according to claim 1, characterized in that: The piezoelectric actuator is a micro-electromechanical pump, comprising: A first substrate having a plurality of inflow holes, wherein the plurality of inflow holes are tapered; A first oxide layer is stacked with the first substrate, the first oxide layer has a plurality of confluence channels and a confluence chamber, the plurality of confluence channels are connected between the confluence chamber and the plurality of inflow holes; A second substrate, bonded to the first substrate, comprising: A silicon wafer layer having: A moving part, circular in shape; An outer peripheral portion, in a hollow ring shape, surrounding the outer periphery of the actuating portion; A plurality of connecting parts, respectively connected between the actuating part and the peripheral part; and A plurality of fluid channels surround the periphery of the actuating portion and are respectively located between the plurality of connecting portions; a second oxide layer, formed on the silicon wafer layer, in a hollow ring shape, and defining a vibration chamber with the silicon wafer layer; and A silicon material layer, in a circular shape, located on the second oxide layer and bonded to the first oxide layer, having: A through hole formed in the center of the silicon material layer; a vibrating portion located in a peripheral area of ​​the through hole; and a fixing portion located at a peripheral region of the silicon material layer; and A piezoelectric component is circular and stacked on the actuating portion of the silicon wafer layer.

13. The external gas detection device according to claim 12, characterized in that: The piezoelectric component comprises: The lower electrode layer; a piezoelectric layer stacked on the lower electrode layer; an insulating layer, laid on a portion of the surface of the piezoelectric layer and a portion of the surface of the lower electrode layer; as well as An upper electrode layer is stacked on the insulating layer and the remaining surface of the piezoelectric layer not provided with the insulating layer, and is used for electrically connecting with the piezoelectric layer.

14. The external gas detection device according to claim 1, characterized in that: The invention further comprises a control circuit unit, on which a microprocessor and a communicator are electrically connected, wherein the microprocessor can control the driving signal of the gas detection module to detect and start the operation, and convert the gas information of the gas detection module into a detection data for storage, and the communicator receives the detection data output by the microprocessor, and can transmit the detection data to an external transmission device through communication for storage, so as to prompt the external transmission device to generate a gas detection information and a notification alarm.

15. The external gas detection device according to claim 14, characterized in that: The external transmission device is one of a cloud system, a portable device and a computer system.

16. The external gas detection device according to claim 14, characterized in that: The gas detection module and the control circuit unit are assembled and electrically connected to each other to form a gas detection transmission module. The length of the gas detection transmission module is between 35mm and 55mm, the width is between 10mm and 35mm, and the thickness is between 1mm and 7.5mm.

17. The external gas detection device according to claim 16, characterized in that: The gas detection transmission module is accommodated in the shell, covered and protected by the shell, and the external connector is exposed for electrical connection to form the external gas detection device. The length of the external gas detection device is between 45mm and 70mm, the width is between 25mm and 42mm, and the thickness is between 7mm and 13mm.

18. The external gas detection device according to claim 14, characterized in that: The external connector can provide electrical energy to an external connection device, and transmit the detection data output by the microprocessor to the external connection device for processing and application. The external connection device can transmit the detection data to an external transmission device for storage through external communication, so as to prompt the external transmission device to generate gas detection information and a notification alarm.

19. The external gas detection device according to claim 18, characterized in that: The external connection device is a mobile device.

20. The external gas detection device according to claim 14 or 18, characterized in that: The control circuit unit further comprises a power module, which can receive and store electric energy by wireless transmission through a power supply device to start the operation of the gas detection module.

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